Last year there was a Kickstarter project for a new C.P. Goerz Citograph 35mm f/8 "always-in-focus" lens that will be available also for Leica M-mount. The picture above is the first Citographs arriving out of production. Here are the lens technical specs:

Focal length 35 mm

Magnification ratio 1:8

Optical construction 4 elements in 3 groups

Field of view +/- 31°

Distortion ≤ 1% Light loss max. 27 %

Focussing 3m bis ∞

Filter thread M 37 x 0,75

Dimensions Ø 58 mm x 23 mm

Weight ±. 120g

The lens will be available with mounts for: Nikon, Canon, Sony, Leica M, Micro Four Thirds and Fuji